/Engine/Plugins/Animation/IKRig/Source/IKRigEditor/Public/RigEditor/IKRigController.h
Called whenever a retarget chain is removed.
typedef TMulticastDelegate_TwoParams< void, [UIKRigDefinition](API\Plugins\IKRig\Rig\UIKRigDefinition) *, const [FName](API\Runtime\Core\UObject\FName) > FOnRetargetChainRemoved